Foot rest for stoping drills



March ll, 1930. MARSH 1,750,415

FOOT REST FOR STOPING DRILLS Filed Dec. 29, 1927 g, Mains-7p.

(1 Hon we Patented Mar. 11, 1930 PATENT OFFICE GAIL G. MARSH, F BUTTE,MONTANA FOOT BEST FOR STOPING DRILLS Application filed December 29,1927. Serial No. 243,379.

The present invention is directed to improvements in foot rests forstoping drills. The primary object of the invention is to provide adevice of this character so constructed that the drill can be operatedat any angle without the danger of the same slipping.

Another object of the invention is to provide a device of this kindwhich when engaged upon the lower end of the feed piston of a stopingdrill will enable the drill runner to operate the drill in a verticalposition, or at various angles.

With these and other objects in view, this invention resides in thenovel features of construction, formation, combination and arrangementof parts to be hereinafter more fully described, claimed and illustratedin the accompanying drawing, in which,-

Figure 1 is a side elevation of the drill, showing the device in placethereon.

Figure 2 is an end view of the foot piece. Figure 3 is a detailsectional view through the foot piece. I

Referring to the drawing, 1 designates the cylinder of a stoping drilland 2 the front head thereof, which, as usual has engaged therein thedrill steel 3. The pneumatically operated feeding means includes, asusual, a barrel L in which is slidable the feed piston 5, the barrelbeing connected to the back head 6 of the drill.

The foot piece 7 includes a substantially ball-shaped body 8 having anintegral shank 9, said shank having a threaded stem 10 adapted to engagethe threaded socket 11 formed in the lower end of the feed piston 5, asclearly shown in Figure 1 of the draw- 1n The body is formed with upperand lower circularly alined threaded sockets 12 which have threadedtherein the shanks 13 of the calks 1 1, said calks having pointed ends15 which are adapted to bite into the board 16. It will be observed thatthe calks are inclined downwardly in order that one or more will biteinto the boards when the drillis in an inclined position, or whensubstantially horizontal for drilling lift holes.

In addition to these calks a calk 17 is secured in the same manner indirect alinement with the shank 9 and will obviously bite into the boardwhen the drill is in a vertical position.

The foot piece of a drill of this type usually has its lower end pointedin order that the same will bite into a board when the drill is used fordrilling raises, but when it is desired to widen drifts it is necessaryto operate the drill in an inclined position, which being the case, thepointed end will ofttiines slip. This objection has to some extent beenovercome by placing a cleat upon the board against which the foot piecerests. The presence of the cleat upon the board will obviously interferewith inuckers shovels, and it will be obvious that by providing a footpiece with a plurality of angularly disposed calks, the cleat can bedispensed with.

Having thus described the invention, I claim:

A foot piece of the character described comprising a ball shaped body,said body having spaced series of circularly alined sockets formedtherein, calks engaged in the sockets and disposed in angular relationwith respect to the longitudinal axis of the body, a single calkconnected with the body in alinement with the longitudinal axis thereoffor engagement with a support when the longitudinal axis of the body isperpendicular, the calks of the circular series being adapted to engagethe support when the longitudinal axis of the body is in an inclined orhorizontal position.

In testimony whereof I aflix my signature.

GAIL G. MARSH. [n s.]

